Universal grinding fixture



Jan. 13, 1948. H. N. swENsoN UNIVERSAL GRINING FIXTURE Filed Maren 5, '194e 4 she's-sheet 1 www www

ATTORNEY Jan. 13, 1948. A H, N, SWENSQN 2,434,600

UNIVERSAL GRINDING FIXTURE Filed March 5, 1946 4 Sheets-Sheet 2 n Ilxlllml" TTORNEY Jan. 13, E948; H N, SWENSON 2,434,600

UNIVERSAL GRINDING FIXTURE Filed March 5, 1946 A 4 Sheets-Sheet 3 INVENTOR AT RNEY Jan. 13, 1948. H, N, swENsoN 2,434,600

UNIVERSAL GRINDING' FIXTURE Filed March 5, 1946 4 Sheets-Sheet 4 INVENTOR AT RNEY Patented Jan. 13, 1948 UNITED STATES PATENT OFFICE UNIVERSAL cmNDI-No FIXTURE Helge Swenson, Unioni N.. J a

Application March 5. 1946. serial; No. @52.1.12

(Cl. 51e-21'?) My invention relates generally to improvements in machine tools and more particularly to a universall grinding fixture or attachment for use with a grinding or other form of machine, and constituting a combined Work supporting dividing head and Work rotating mechanism for supporting the work to be ground or otherwise machined in operative relation to the. grinding or other tool.

An object of my invention isl to provide a xture or attachment which can be adjusted in a vertical or' horizontal `plane or both with respect to the work holding member or quill.

Another object of my invention is to provide a Work carrying spindle mounted for universal adjustrnent relative to a grinding orsimilar tool, which spindle and the work carried therebycan be accurately secured in anyv desiredv position to which it is adjusted and which can be readily set so that it can be utilized as a dividing head or when the dividing head elements are rendered inoperative can be continuouslyrotated for forming surfaces of revolution.

Another object of my invention is to provide an improved and simplified form of sucha device which can be easily and conveniently manipulated for securing the Work accurately in its position to be operated upon and to provide for an increased range of adjustability over the Work relative to the grinding tool, for example, to prov-ide for 360 or more of rotation for adjustment of the head in which the Work carrying spindle is journalled, and at the same time to provide for a compact and simple organization of component parts.

A still further object of my invention is to provide such a device having means for facing grinding Wheels and theA like.

Another object of my invention is to provide a device of the kind described in which the Work engaging member or quill may be rotated' manually for cylindrical grinding and in which the axis of the WorkV may be adjusted to various degrees to grind cones or tapers.

Another object of my invention is to provide a quill arrangement which can be clamped in any position and in which the quill is tapered on` the outside to. permit take up of wear.

Another object of my invention is to provide a simple and effective-means for engaging the Work memberv or disengaging the Work from the quill.

These and otherl objects will appear hereinafter.

The novel features which I believe to be characteristic of my invention are set forth with particularity in the appended c laims, but the invention itself will best be understood by reference to the following description taken in connection with the accompanying drawing in which Figure 1 is alongitudinal section taken through the line I=..I of Figure 2, Figure 2 is a side view of a xture made according to my invention, Figure 3 is a right end view of Figure 2, and Figure 4 is the opposite end View with a section taken along the line 4-.4 of Figure 2.

In accordanceA with my invention and as shown in Figures I and 2, I provide myv fixture or Work holding device with a base or bed plate I0 upon which is formed the bearing pedestal or column II for supporting a quill and its associated ele-.- ments for rotation in vertical and horizontal planes. Although intended to be fixed to av sup.-l port by magnetic means, I provide slots I2` and I3 for receiving bolts if these are used for securing the fixture.

A bracket I4 is mounted for rotation about a vertical axis upon the pedestal II and is centered thereon and clamped thereto by means of thever.- tical stud I5, see Figure 4, threaded to receive the knurled nut I6, which when tightened prevents rotation of the bracket I4. The bracket I4 is provided with a bearing portion I1 formed offcenter with respect to the bracket. This bearing portion I1 is conically shaped and calibrated at one end t8 preferably in degrees. It is provided with an internal bore I9 for rotatably supporting a rotatable quill supporting member 20 having a generally T-shaped longitudinal section.

The stem of the T-shaped quill supporting member has a bore extending therethrough along its axis, a portion 2| of which is threaded to receive the screw member 22. Adjustment of this member locks the T-shaped quill supporting head against rotation when screwed up tight after the device has been adjusted to the desired position. Thus it will be observed that the quill supporting bracket is constructed to permit rotation on a vertical as Well as a horizontal axis.

The head of the T-shaped member slotted at 2S and having bosses 21 and 28 cooperating with screwv 29 for reducing the slot Width is provided with a central bore which receives a rotatable sleeve or quill 25 having a calibrated flange 30 at one end. This sleeve is tapered at its anged end and receives a tapered slotted collet 3| for engaging a, workpiece therein. The inner end of the collet is threaded on the outside at 32. The other ter for receiving a workpiece and for clamping the workpiece against rotation.

Relative rotation of the collet and the sleeve is prevented by means of the set screw 36 supported by the sleeve 25 and extending into a slot 25' in the outer surface of the collet member. A collar 31 locked tothe sleeve 25 by set screw38 maintains the sleeve within the bore in the head of the T-member, thus preventing longitudinal movement of the sleeve while permitting rotation. The collet, sleeve and the crank all rotate together when the indexing mechanism to be 4described is rendered inoperative.

To prevent rotation of the sleeve so that theV collet may be operated to engage or disengage the work, I provide a pin member 50 which may be Y tatingr together, said collet having longitudinal pushed inwardly against the spring member 53,

the pin member 50 being provided with a transverse pin 52 engaging the end of the spring. The other end of the spring is in contact with the sleeve. The sleeve is provided with an aperture 54 into which the pin 50 may be inserted to prevent rotation of the sleeve. In this position the crank may be rotated relative to the collet to cause the collet to move into or out of the sleeve 25 in the T-member, thus contracting or expanding the slotted work engaging end.

One end of the T-member is provided with a plate or ange 46 having a plurality of apertures 46. The sleeve is provided with a second collar member 39 secured to the sleeve byset screw 4D and supporting the pin member 4l having the recessed annular sections 42 and 43 with which the spring pressed ball 45 engages to retain the pin 4| in one of two positions. In the forward position the end of the pin engages one of a plurality of apertures 46 to prevent rotation while the workpiece is being worked upon. The work may be indexed in the usual way by rotating the quill and inserting the pin in any of the apertures in succession or otherwise. This results in a many sided iimshed product. If continuous rotation is desired to provide cones or the like, the pin 4I is retracted and continuous manual rotation by means of crank 34 can be had.

For facing grinding wheels I provide a diamond mounting 60 which may be mounted in vertical or horizontal position as shown.

It will thus be observed that I have provided a device which may be adjusted in all planes, one in which the work maybe continuously rotated to provide round or conical sections or may be indexed to provide a many'ffaced element and in which the collet may be operated to quickly engage or disengage the workpiece. The device has also been considerably simplified over those now existing in the art.

While I have indicated the preferred embodiment of my invention of which I am now aware and have also indicated only one specic application for which my invention may be employed, it will be apparent that my invention is by no means limited to the exact forms illustrated or the use indicated, but that many variations may be made in the particular structure used and the purpose for which it is employed Without departing from the scope of my invention as set forth in the appended claims.

What I claim as new is:

1. A universal work supporting member comprising a base, a bracket mounted for rotation about a vertical axis on said base, said bracket having a bore extending therethrough, a T- shaped member supported in said bore for rotation about a horizontal axis, means for xing movement Vwith respect to said sleeve upon relative rotation of said crank member and collet for adjusting said collet, means supported by the leg of said T-shaped member for engaging said sleeve to prevent rotation thereof, whereby said collet and crank may have relative rotation with respect to each other, and means for preventing relative rotation between said collet and said sleeve but permitting relative longitudinal movement. A

2. A universal work supporting device coml prising a base, a bracket mounted for rotation about a vertical axis on said base, said bracket having a bore extending therethrough, a T- shaped member supported in said bore for rotation about a horizontal axis and means for xing said bracket against rotation about said vertical axis, and other means for xing said T- shaped member against rotation about said horizontal axis, said T-shaped member having a bore extending through the head thereof, a iirst sleeve received within said last bore for rotation therein, a collet received within one end of said iirst sleeve and a second sleeve having a. crank received in the other end of the rst sleeve, said second sleeve and said collet having portions threadedly engaged with each other, said collet, sleeves and crank normally rotating together, said collet having relative longitudinal movement with respect to said second sleeve upon relative rotation of said second sleeve and collet for ad- I respect to each other, said means comprising a,

spring pressed pin biased away from said rst sleeve, said first sleeve having an aperture therein for receiving the end of said pin.

3. A universal work supporting device having `a base, a bracket mounted for rotation about a vertical axis on said base, said bracket having a bore extending therethrough, a T-shaped member having its leg supported in said bore for rotation about a horizontal axis, said T-shaped member having a. bore extending through the head thereof, a sleeve received within said last bore for rotation therein, a collet received Within one end of said sleeve and a crank member received within the other end of said sleeve, said crank member and said collet having portions engaged with each other and normally rotating together, said collet having only longitudinal movement with respect to said sleeve upon relative rotation of said collet and crank member 'to adjust said collet, the leg of the T-shaped member having a bore extending longitudinally therethrough and being threaded at its outer end, and a screw member comprising a head and a threaded shank engaged in the threaded portion of the bore of said leg, the head of said screw member engaging the exterior of said bracket for lockingrsaid T-shaped member against rotation about a, horizontal axis, said screw member having a bore extending therethrough and communicating with the bore in the leg of said T-shaped member, a pin extending through the bore in said screw member and said leg for engaging said sleeve to prevent rotation thereof, whereby said collet and crank may have relative rotation with respect thereto.

4. A universal work supporting device having a base, a bracket mounted for rotation about a vertical axis on said base, said bracket having a bore extending therethrough, a T-shaped member having its leg supported in said bore for rotation about a horizontal axis, said T-shaped member having a bore extending through the head thereof, a sleeve received within said last bore for rotation therein, a collet received within one end of said sleeve and a crank member received within the other end or said sleeve, said crank member and said collet having portions engaged with each other and normally rotating together, said collet having only longitudinal movement with respect to said sleeve upon relative rotation of said collet and crank member to adjust said collet, the leg of the T-shaped member having a bore extending longitudinally therethrough and being threaded at its outer end, and a screw member comprising a head and a threaded shank engaged in the threaded portion of the bore of said leg, the head of said screw member engaging the exterior of said bracket for locking said T-shaped member against rota- I tion about a horizontal axis, and means carried by said leg for locking said sleeve against rotation to permit adjustment of said collet.

5. A universal work supporting device having a base. a bracket mounted for rotation about a vertical axis on said base, said bracket having a bore extending therethrough, a T-shaped member supported in said bore for rotation about a horizontal axis, said T-shaped member having a bore extending through the head thereof, a sleeve received within said last bore for rotation therein, a collet received within one end of said sleeve and crank member received in the other end of said sleeve, said crank member and said collet having portions engaged with each other and normally rotating together; said collet having only longitudinal movement with respect to said sleeve upon relative rotation of said collet and crank member to adjust said collet, the leg of said T-shaped member having a bore extending longitudinally therethrough and being threaded at its outer end, and a screw means engaged in said threaded portion and contacting the end of said bracket for fixing said T-shaped member against rotation, said screw means having a bore extending longitudinally therethrough and cornmunicating with the bore in said leg, and a pin extending through the bore in said screw means and said leg for engaging said sleeve to prevent rotation thereof, whereby said collet and crank may have relative rotation with respect thereto.

6. A universal work supporting device having a base, a bracket mounted for rotation about a vertical axis on said base, said bracket having a bore extending therethrough, a T-shaped member supported in said bore for rotation about a horlzontal axis. said T-shaped member having a bore extending through the head thereof, a sleeve received within said last bore for rotation therein, a collet received within one end of said sleeve and a crank member received in the other end of said sleeve, said crank member and said collet having portions engaged with each other and normally rotating together, said collet having only longitudinal movement with respect to said sleeve upon relative rotation of said collet and crank member to adjust said collet, the leg of said T-shaped member having a bore extending longitudinally therethrough and being threaded at its outer end, and a screw means engaged in said threaded portion and contacting the end of said bracket for fixing said T-shaped member against rotation, said screw means having a bore extending longitudinally therethrough and communicating with the bore in said leg, and a pin extending through the bore in said screw means and said leg for engaging said sleeve to prevent rotation thereof, whereby said collet and crank may have relative rotation with respect thereto, one end of the head of said T-shaped member being provided with a flange,

said flange having a plurality of apertures spaced therearound adjacent the periphery thereof, and means on said crank member for engaging said apertures to permit indexing of said collet and crank.

7. A universal work supporting device having a base, a bracket mounted for rotation about a vertical axis on said base, said bracket having a bore extending therethrough, a, T-shaped member having its leg supported in said bore for rotation about a horizontal axis, said 'IT-shaped member having a bore extending through the head thereof, a, sleeve received within said last bore for rotation therein, a collet received within one end of said sleeve and a, crank member received within the other end of said sleeve, said crank member and said collet having portions engaged with each other and normally rotating together, said collet having only longitudinal movement with respect to said sleeve upon relative rotation of said collet and crank member to adjust said collet, the leg of the T-shaped member having a bore extending longitudinally therethrough and being threaded at its outer end, and a screw member comprising a head and a. threaded shank engaged in the threaded portion of the bore of said leg, the head of said screw member engaging the exterior of said bracket for locking said T-shaped member against rotation about a, horizontal axis, said screw member having a bore extending therethrough and com-A municating with the bore in the leg of said T-shaped member, a pin extending through the bore in said screw member and said leg for engaging said sleeve to prevent rotation thereof, whereby said collet and crank may have relative rotation with respect thereto, said T-shaped member having a slot extending longitudinally of the head thereof and a pair of bosses on opposite sides of said slot and means within said bosses for contracting said slot to lock said sleeve against rotation.

, HELGE N. SWENSON.

REFERENCES CITED The followingreferences are of record in the file of this patent:

UNITED STATES PA IEN IS Number Name Date 1,613,174 Koeln Jan. 4, 1927 2,214,166 Hertlein Sept. 10, 1940 2,351,246 Walling June 13, 1944 2,401,874 Kilbride June 11, 1946 

